In its statement, Turing made no mention of why Shkreli resigned or his pending charges.

Attorneys for Shkreli, who made national news well before his arrest for raising the price of an HIV medication from $13.50 to $750, released a statement Thursday saying he is "confident that he will be cleared of all charges."

"Mr. Shkreli expects to be fully vindicated," the statement from his attorneys reads.

He entered a not guilty plea and is out on a $5 million bond.

Shkreli listed himself as founder and CEO of Turing Pharmaceuticals since October 2014, according to his LinkedIn profile.

Shkreli, 32, is an active Twitter user and has not posted anything on his verified account since his resignation, but his bio still lists him as the CEO of the company.

His last tweet came after he was released on $5 million bond, writing: "Glad to be home. Thanks for the support."